<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>海军管理</title>
</head>
<style>
  *{
      padding: 0;
      margin: 0;
  }

  body{
      width: 883px;
      margin: 0 auto;
  }
    #redblock{
        text-align: center;
        display: table-cell;
        vertical-align: middle;
        width:auto;
        height: 530px;

    }

    img{
        max-width: 100%;
        max-height: 100%;

    }
</style>
<body>
<div id="redblock">
<img src="../img/739912.jpg" height="530px" width="auto">
</div>
</body>
</html>